Ditch Witch JT100AT - Manual (Page 92)

JT100/JT100 All Terrain Operator’s Manual
Prepare - 91
Plan Bore Path
CMW
©
Bore Path Calculator - Power Pipe
®
Entry pitch, setback, and minimum depth work together with bend limits to determine the bore path. To find
the setback (B) and entry pitch (A) that will take you to the desired minimum depth (D), use the chart
below.
Minimum depth (D) Entry pitch (A) Setback (B) Depth to begin steering (S)
6 ft 10 in (2.08 m) 11.3° / -20% 54 ft 6 in (16.61 m) 2 ft 10 in (0.86 m)
7 ft 11 in (2.41 m) 12.4° / -22% 58 ft 3 in (17.75 m) 3 ft 2 in (0.97 m)
9 ft 1 in (2.77 m) 13.5° / -24% 62 ft 0 in (18.90 m) 3 ft 5 in (1.04 m)
10 ft 3 in (3.12 m) 14.6° / -26% 65 ft 8 in (20.02 m) 3 ft 8 in (1.12 m)
11 ft 6 in (3.51 m) 15.6° / -28% 69 ft 4 in (21.13 m) 3 ft 11 in (1.19 m)
12 ft 10 in (3.91 m) 16.7° / -30% 72 ft 10 in (22.20 m) 4 ft 2 in (1.27 m)
14 ft 2 in (4.32 m) 17.7° / -32% 76 ft 4 in (23.27 m) 4 ft 5 in (1.35 m)
IMPORTANT: Numbers in table based on 205’ (62.5 m) minimum bend radius, and beacon housing,
EZ-Connect, transition sub, and half of first drill pipe (L, totaling 14’ 7” [4.45 m]) in the ground before
steering.